cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/fmal.c -o math/fmal -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
math/fmal.c:5:61: error: ‘fmal’ undeclared here (not in a function); did you mean ‘fmaxl’?
    5 | long double (*foo)(long double, long double, long double) = fmal;
      |                                                             ^~~~
      |                                                             fmaxl